So much going on here Chopin. It’s not surprising that you have experienced the polarity of emotions from euphoria to drained, to exhausted and ultimately flat.
It’s all so emotionally charged, frustrating and you are ultimately powerless here.
This situation with your DD1 most likely rips at the very core of your own sense of self as a mother because how could your adored first born do this to their own mother? That’s when the crippling self doubt creeps in, but also vacillating with rage at her relentlessly cruel behaviours and then mixed up with a huge underlying urge to protect and rescue her because you sense danger.
So you are thrown into the perpetually mentally distressing, cyclical, stuck state of “cognitive dissonance” - which results from trying to simultaneously hold vacillating conflicting beliefs, values and feelings. As we emotionally tend to seek a single stance and reach consistency in our perceptions, thoughts and attitudes, this constant internal conflict, when things don’t make sense, when our gut is churning and at odds with what our thoughts are oscillating between, causes feelings of deep unease and extreme discomfort.
You have been living like this for years and years. You know she is in danger because there is so much evidence of classic intimate partner violence (doesn’t have to be physical to have this definition), coercive control (reproductively, financially, emotionally, socially), and his undeniable personality disordered behaviours which he has displayed with other people in many other settings.
He has her fully immersed in his mental control like a cult leader.
You are also the key threat to him and at the same time it seems your are her only social contact with the outside world, before she started her recent PGCE training. She is almost 100% socially and emotionally isolated - if it weren’t that you are a high value potential revenue stream to him, he would not allow her contact with you.
So with the call there was a lot of deep information revealed by her - how desperate she must be to not want him at the birth - how much her own body is physically screaming at her to resist him by halting labour. I suspect that these multiple pregnancies in quick succession were not her choice. That doesn’t mean she doesn’t love her babies. And she is probably unconscious of much of this because any thoughts deviating from his unhinged world view are very dangerous to her.
I think it’s a significant breakthrough that she has shared these deeply personal fears - I doubt she has shared them with him. As PP has said midwives, other HCPs, education systems are trained to look out for coercive control and abuse and taught to handle it delicately with safety in mind.
Maybe people at her work have observed behaviors or are concerned - it’s a real shame that she isn’t carrying on working. I thought she would take the job just to work for half a term to get the maternity leave pay. Does she ever speak of her colleagues, fellow students etc?
At some point you could mention to her that the midwives might subtly arrange a plan with her for him not to be there - maybe mention to her to bring this up when she gets a private moment with one.....but don’t let on that they will be looking out for this.
I know that others on this thread see her as the perpetrator and fully responsible for her odious and selfish actions towards you (which she is) and maybe I am just too soft - but I also sense someone who is acting out due to the extreme emotional pressure she is under, due to being trauma bonded to, and abusively controlled by, a very mentally unstable and vile man.
I suspect that she spends a life walking on eggshells - and “fawning” (which is a classic trauma response among the other options of fight, fright, flight, freeze, flop) - to keep him subdued.
This doesn’t excuse her actions but maybe explains them. It doesn’t mean that you should expose yourself or tolerate them either. It’s just, I think, something to hold in mind.
It seems from the conversation that she is resolute in never apologising or acknowledging your hurt or even meeting you somewhere in between. Maybe this is too painful for her (her own cognitive dissonance) too threatening to her emotionally or too much of a risk of betrayal of LB that she has to dig in her heels - or maybe she is just cold, uncompromising, arrogant and without empathy or compassion. Or maybe she can be both when she chooses to.
Either way she has told you that she is drawing a line under it - it is now clear that there is nothing further to be gained in worrying or talking about it. The resolution and understanding you had hoped for on this past chapter will not happen now.
You have a simple choice to make. It’s either unacceptable to you that she is unable or unwilling to apparently reflect on this chapter, so much so, that you cannot continue the relationship or you choose to continue an adapted relationship with her at an emotional depth and with boundaries at a specific level that you choose to emotionally invest to, sufficient first to keep you emotionally protected and safe and still in contact with her - but not to the extent that you are an outlet for her unconscious distress with LB so much that it inadvertently enables that abusive relationship.
As ever your other DDs are your joy, hope, pleasure, support and source of restoration and comfort.
Keep immersing yourself in this reciprocal, unconditional loving space - and don’t let DD1 antics dominate or pollute this - prioritise their lives, lives, successes etc